# Simple OAuth2 with Password and Bearer { #simple-oauth2-with-password-and-bearer }

Now let's build from the previous chapter and add the missing parts to have a complete security flow.

## Get the `username` and `password` { #get-the-username-and-password }

We are going to use **FastAPI** security utilities to get the `username` and `password`.

		for p := range latestMeta.Parts {
			if verifyErr != nil {
				dataErrsByPart[p][i] = convPartErrToInt(verifyErr)
			} else {
				dataErrsByPart[p][i] = verifyResp.Results[p]
			}
		}
	}

	// Build dataErrs by disk from dataErrs by part
	for part, disks := range dataErrsByPart {
		for disk := range disks {
			dataErrsByDisk[disk][part] = dataErrsByPart[part][disk]
		}
	}
	return dataErrsByDisk, dataErrsByPart

# Using Dataclasses { #using-dataclasses }

FastAPI is built on top of **Pydantic**, and I have been showing you how to use Pydantic models to declare requests and responses.

But FastAPI also supports using <a href="https://docs.python.org/3/library/dataclasses.html" class="external-link" target="_blank">`dataclasses`</a> the same way:

{* ../../docs_src/dataclasses_/tutorial001_py310.py hl[1,6:11,18:19] *}

import org.gradle.work.DisableCachingByDefault
import java.io.File
import java.util.SortedSet


/**
 * Tests that check the end-to-end behavior of a Gradle distribution.
 * They can have a locally built Gradle distribution on their runtime classpath
 * and distributions as well as local repositories as additional test inputs
 * to test functionality that requires rea distributions (like the wrapper)

    @JvmName("shouldRunBrokenForConfigurationCacheDocsTests") get() = gradleProperty(RUN_BROKEN_CONFIGURATION_CACHE_DOCS_TESTS).orNull.toBoolean()


/**
 * Is a promotion build task called?
 */
val Project.isPromotionBuild: Boolean
    get() {
        val taskNames = gradle.startParameter.taskNames
        return taskNames.contains("promotionBuild") ||

		count++
	}
	if err := scanner.Err(); err != nil {
		fmt.Fprintln(os.Stderr, "reading input:", err)
	}
	fmt.Printf("%d\n", count)
	// Output: 15
}

// Use a Scanner with a custom split function (built by wrapping ScanWords) to validate
// 32-bit decimal input.
func ExampleScanner_custom() {
	// An artificial input source.
	const input = "1234 5678 1234567901234567890"

Esto también significa que si algo cambió será **reflejado** automáticamente en el código del cliente. Y si haces **build** del cliente, dará error si tienes algún **desajuste** en los datos utilizados.

            return this;
        }

        public Builder embedded(boolean embedded) {
            this.embedded = embedded;
            return this;
        }

        public ParserRequest build() {
            return new ParserRequestImpl(
                    command,
                    commandName,
                    List.copyOf(args),
                    lookup.lookupOptional(Logger.class).orElse(logger),

        event.setTrace(trace);
        event.setMetadata(metadata);
        event.setException(exception);
        event.setRepository(repository);

        repositoryEventDispatcher.dispatch(event.build());
    }

    private void merge(
            Artifact artifact, Map<String, VersionInfo> infos, Versioning versioning, ArtifactRepository repository) {

             * the plugin Gradle distribution, this is only true at compile time.
             *
             * At runtime, the 'DefaultImportsReader' will be the version from the distribution actively being built/tested.
             */
            val clazz = DefaultImportsReader::class.java
            return clazz.getResource(RESOURCE)
                .readText()
                .split('\n')